Feeding mechanism for overseaming machines



Feb. 6, 1923.

J. R. MOFFATT. v Fal-:DING MEcHANlsM FOR OvERsi-:Ammc MAcHlNr-:s

,4 SHEETS-SHEET l FILED Nov, 11. 1920.

Feb. 6, 1923. 1,443,962

J. R. MOFFATT.

FEEmNG MEcHANlsM FOR OVERsx-:AMING MACHINES,

FlLaD Nov. 1l. 1920. 4 SHEETS-SHEET 2 Feb. 6, 1923.

J. R. MOFFATT. FEEDING MEcHANlsM FOR OVERSEAMING MACHINES.

4 sHEETs'sHEET 3 FILED Nov. l l 1920 .n ....ll: i Sill ...I Ili l wu@ nto/o Feb. 6, 1923.

` J. R. MOFFATT FEEDING MEcHANlsM FOR UVERSEAMI NG MACHINES 4 sHEETs-sHEET 4 Fx LED Nov l l 1920.

Patented Feb. 6, 1923.

JAMES n. ivrorrAr'r, or CHICAGO,v ILLINOIS, Assis-Nonv 'ro UNION SPECIAL MACHINE COMPANY, or CHICAGO, ILLINOIS, A ConronATIONfor ILLINOIS.

FEEDING MEGHANISM FOR OVERSEAMNG lli/L QC'EIINES.v r

Application led November 11, 1920. Serial N 0.423,305.l

To all whom t may concern:

Be it known that l, JAMES R. MoFFA'r'r, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in 'Feeding Mechanisms for @verseaming Machines, of which the following is a description, reference being had to the accompanying drawing, and to the figures of reference marked thereon.

The invention relates to new and useful improvements in feeding mechanisms for overseaming machines, and more particularly anoverseaming machine of the cup feed type, such as shown, for example, in the (nderdonk Patent 1,187,784, granted May 4, i915.

An object of the present invention is to provide means for positively driving the outer feed cup or roller by means of a shaft which is so constructed as to permit said outer feed cup or roller to be moved away from the inner feed cup or roller to permit the insertion and removal of the material operated upon.

In the drawings, whichshow by way of illustration, one embodiment of the invention Figure l is a view partly in side elevation and partly in vertical section, of a sewing machine embodying my improvements;

Figure 2! is a sectional view on the line 2 2 of Figure l;

Figure 3 is a view partly inside elevation and partly in vertical section, showing the inner feed cup and the means for operating the saine;

Figure 4 is a plan view of the machine with the cover plates for the cross driving shaft removed; f

Figure 5I is a sectional view on the line 5 5 of Figure l;

Figure 6 is a sectional view on the line 6 6 of Figure l;

'Figure 7 is a sectional view 7 7 of Figure l;

Figure S is a detail in side elevation, of a section of the cross shaft, the parts being separated to show the construction;

Figure 9 is a perspective view of the supporting bracket for the outer feed cup;

Figure l() is a sectional view on theline 10-10 of Figure 4.

The invention above noted is directed to a feeding mechanism for a cup feed type of Von the line sewingy mfachine that is, a machine wherein two feedcups or rollersrotateabout verti-.

cal axes and Supportthe material in a ver-- tical plane which is to be stitched. The needle moves in a horizontal pathand the looper moves rfrom one side of the material f to'the other, forming overseaming stitches. In the present machine, both the inner and the outer feed cups are positively driven.

The outer' feed Cup is mountedso that it may bemoved toward and from the inner feed cup to accommodate different thicknesses of materialv and to permit the insertion and removal of the materialv to be stitched. The cross driving shaft for posi;- tively rotating the outer feed cup is provided with universal joints and atele'scoping section, so as to permit this freedom of movement and without disturbing thepo-sitive driving connection for the outer feed Cup to the train ofinechanisinoperating the same. i

Referring more in vdetail to the drawings, my improvements are shown and applied to a sewing machine consisting of a main casing 1.,.in which is .mounted to reciprocate a needle bar carrying av needle 2. The needle bar, as above noted, reciprocates in a horizontal plane. Co-opei-ating with this needle baiis` a looper 3 which moves from one sideof the fabric to the otheigthus foi-mingen overseaming stitch. This type` of machine is common inthe art and, further description of the stitching mechanism is not thought necessary. 1

The material is clamped'and supported during the stitching operation between an inner feed cup 4 and anv outer feed cup 5. The inner feed cup et is carried by a shaft 6 mounted in a bracket 7 secured to the. casing. At the lower end of the shaft 6 there is an intermittent clutch mechanism 8, which turns the shaft step by step'.` This clutch mechanism is also very. common in the art and ay detail description thereof is l not thought necessary. The operating arm 9 of the clutch'mechanisni is connectedVv by means of a link l0 to an arm ll, carried at the lower end of the shaft 12, mounted in Suitable bearings on the mainv casing l. This shaft 12 carries an arm 13 at its upper end to whichan eccentric strap lil is connected. with an eccentric on the main shaft l5. AS this main shaft rotates, the shaft 6 will be The eccentric strap co-operates given an intermittent or step by step movement in `a clockwise direction, as viewed in Figure 2. This turns the inner feed cup step by step and feeds the material astitch length, the feed cup remaining idle during the time when the needle is in the material.

The .outer feed cup 5 isv carried by a shaft 16, mounted in a bracket 17. Said shaft is provided with a beveled gear 18 at its upper fend which meshes with a beveled gear 19 ycarried,by a cross drivingshaft 20. The cross shjaft20-fcarries a beveled gear 21 meshing with at'b'eveled gear 22, carried by a Vverticalfshaft 23. This vertical shaft 23 is i.. ,n t, in.. l mounted 1n suitable bearings in the main casing 1. vAtfthe lower end'of the shaft 23 is a gear '24 which meshes with a gear 25 and tlie gear `25 in turn meshes with a gear y26 which is fixed to the shaft 6. vThe shaft '6 rotates step bystep to feed the material. v

Throug'hthe gearathe vertical shaft 23 andthe cross shaft 2O impart a step by step movement tothe shaftl carrying the outer feed cup. he outer feed cup is, therefore, positively driven in timing with the inner feed cup and cti-operates with the inner feed cup jin feedingthe material to and from the needle. Y ,Y p. y. The bracketl17 is pivcted at 27 to the supp'rting yarm 28, which is shown in detail in Figure 9 ofthe drawings. `Said arm is provided with elongated slots 29--29 through which screws pass into the rmain casing and thereby the arm is secured to the main casing so that it may be bodily adjusted in a hori- Zontalfplane. The pivotal connection is in the formo'f a short shaft freelyjournaled -in the spaced ears 30--30, carried by the bracket 28. yThe'bracket 17 -is clamped to this short shaftl by means of a screw 31. Secured to the outer end of the short shaft, forming the pivotal Vsupport 27, is an arm 32, which may be connected to .i'treadle, so that'thebracket 17 may be swung on its pivotalsupport 27. ,A spring 'pres's'ing lupwardly* on the arm 32, normally holds the feed. cups in engagement with eachother. Said, arm 32vis` vprovided with spaced pro- ]ectinff earsy 34 and 35, carrying screws 36 and v37., respectively. Theselscrews are so disposed as to `engagerfthe bracket. 28. 'one above and the other below` the same, and serve as limiting means for determining the amount of upward movement given to the outer feed cup when the Atreadle is depressed and also the inward movement of the outer .cupi through the action of the spring 38 when the treadle is released.

1n order that the outer feed cup may be swung toward and from the inner feed cup, the cross shaft 2O is provided with universal joint connections 38 and 39. The shaft between the universal yjoints 38 and 39 lisl in the form of two telescoping sections, one

Vto permit this swinging of the bracket, and

the shaft carrying the outer feed cup, without disturbing thedriviiig connections with this outer feed cup. .Thetelescoping sections also aid in the swinging "of Vvthe parts withoutdisturbing the driving connections as will be obvious from the -above description. l Y y The beveled gears 21 and 22 are housed by acasing 44 which is secured to the bear- Y ing 45 for the inner section ofthe cross shaft 20. The outer gears 18 and 19 are enclosed by a casing46 which-isl 'secured totthebean ing 47 for the 'outer section of the shaft 20, said bearing being mounted on the bracket 17.

The bracket supporting'the outer feed cup is pivoted above the feed cups and the drivv ing` cross shaft for operating the outer feed cup Vis 'above the pivotal ysupport for/the bracket 17 so that the driving connections for the outer feed cup are lentirely* out of the way, 'and at the same time permit ilree movement of the outer feed cup 'without in anyway disturbing the drixfiiig connections. Furthermore, the supporting arm 28 for the bracket 17 may be adjusted upon loosening the lscrews 29, and the outer 1feed cup posb tioned either nearer toor farther fron'rthe inner feed cup, as desired.

It is 'obvious that. 'minor changes iirthedetails of construction vand arrangement. yof parts may be made without departing-fron: ,y the spirit of the invention, as s'ct forthf in the appended claims. i

yHaving thus described the invention, what claiin'as new and desire to secure by Letters-Pa'tenni'sy,

1. A sewing machine including inner anch outer feed cups, a bracket piif'otaiiylsupported above said feed cups, and a driving mechanism for saidv 'cups including af'horizontal shaft disposed above the inner-"feed cup for driving 'the outer feed cup, saidV shaft having flexible parts whereby the bracket mayr be swung to separate the' cups, and beveled gears connecting 'the respective ends of the horizontal shaft with the "feed cups. i l y 2. :i sewing machine including inner and outer feed cups, a bracket pivotally supported above said feed cupsand driving mecha nism for said cups including a horizontal. shaft disposed above the inner feed cup'for driving the outer feed cup, said shaft having spaced universal sections intermediate the same, said teleseoping sections being provided with means whereby one section imparts positive rotation to the other.

3. A sewing machine including inner and outer feed cups, a vertical shaft supporting said inner feed cup, means for 'intermittently rotating said shaft, a second vertical shaft driven from said shaft supporting the inner feed cup and having a bevel gear at its upper end, a third vertical shaft carrying the outer feed cup and having a beveled gear at its upper end, a pivoted bracket supporting said shaft carrying the outer feed cup, a cross driving shaft having bevel gears meshing with the above mentioned bevel gears, said cross driving shaft having flexible parts whereby the bracket may be swung to separate the cups.

4. A sewing machine including inner and outer feed cups, a vertical shaft supporting said inner feed cup, means for intermittently rotating said shaft, a second vertical shaft driven from said shaft lsupporting the inner feed cun and having a bevel gear at its upper end, a third vertical shaftcarrythe outer feed cup and having a beveled gear at its upper end, a pivoted bracket supporting said shaft carrying the outer feedv cup, a cross driving shaft having bevel gears meshing with the above mentioned bevel gears, said cross driving shaft having spaced universal joints and telescoping vsections between the same whereby the bracket .may be swung to separate the cups, and means whereby one of said telescoping sections imparts positive rotation to the other.

fr sewing machine including inner and outer feed cups, a vertical shaft supporting said inner feed cup, means for intermittently rotating said shaft, a second vertical shaft driven from said shaft supporting the inner feed cup and having a bevel gear at its upper end, a third vertical shaft ycarrying the outer' feed cup and hav-l ing a beveled gear at its upper end7 a pivoted bracket supporting said shaft carrying the outer feed cup, a cross driving shaft having bevel gears meshing with'the above mentioned bevel gears, said cross driving ,shaft` having spaced universal joints and telescoping sections between the same wherejoints and telescopingk vshaft driven from said lgears 'meshing' with housing the bevel gears at theends of the cross shaft.

6. .A sewing machine outer feed cups, a vertical shaft supporting said inner feed cup7 means fo-r intermittently rotating said shaft, a second vertical shaft supporting the inner feed'cup and having a bevel gear at its upper end, a third vertical shaft carrying the outer feed cup and having a beveled including inner and positive rotation to the 'Y gear'at its upper end7 a pivoted bracket support bevel gears, a bearing bracket for supporting the cross driving shaft, a bearing for supporting the inner end `of said cross driving shaft, said cross driving shaft having flexion said pivotal ng said shaft carrying the outer feedv cup, a cross driving shaft having bevelk the above mentioned i outer end of said f ble parts between the bearings whereby the pivoted bracket-may be swung to separate the feed cups.

' 7.' A sewing machine said inner feed cup, tently rotating said shaft, a second vertical shaft driven from said shaft supporting the inner feed cup and having a bevel gear at its upper end7 a third vertical shaft carrying the outer feed cup and having a beveled gear at its upper end, a pivoted bracket. supporting said shaft carrying the outer feed a Vcross driving shaft having Abevel `gears meshing with the. above mentioned bevel including inner and 'outer feed cups, a vertical shaft supporting means forintermitgears, a bearing on said pivoted bracket for i supporting the Vouter end of said cross driving shaft, a bearing for supportingthe inner end of said cross `driving shaft, said cross driving :shaft having flexible. parts between the bearings whereby the pivoted bracket may be swung to separate vthe feed cups, a

casing secured to thev bearing for the Outer end of the cross shaft and housing the bevel gears adjacent said outer end,l and a separate spaced casing secured'to the bearing for the inner end 0f the cross shaft and housing the bevel gears adjacent the same.

ture.

JAMES R. h/IOFFATT. v

.In,testimonywhereof7 l affix my signa-k ico 

